Journal
JOURNAL OF RARE EARTHS
Volume 31, Issue 12, Pages 1137-1140Publisher
ELSEVIER
DOI: 10.1016/S1002-0721(12)60417-7
Keywords
phosphor; up-conversion; energy transfer; luminescence; rare earths
Categories
Funding
- National Natural Science Foundation of China [11274251]
- Natural Science Foundation of Hubei Province [2010CDB01607]
- Technology Foundation for Selected Overseas Chinese Scholar, Ministry of Personnel of China (excellent)
- Foundation of Shaanxi Educational Committee [11JK0528]
- Foundation of Key Laboratory of Photoelectric Technology in Shaanxi Province [12JS094]
- Open Foundation of Key Laboratory of Photoelctric Technology and Functional Materials (Culture Base) in Shaanxi Province [ZS11010, ZS1202]
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Yb3+ and Pr3+ co-doped BaRE2ZnO5(RE=Y, Gd) up-conversion (UC) phosphors were successfully synthesized by a modified sol-gel method. The processing parameters and optimal concentration of Pr3+ and Yb3+ were determined. The structures and luminescent properties of samples were characterized by X-ray diffraction (XRD) and photoluminescence spectra (PL). With the excitation of 980 nm laser diode, UC spectra showed five prominent emission bands centered at 484, 514, 546, 656 and 670 nm, which were attributed to the I-1(6)-> H-3(4), P-3(1)-> H-3(4), P-3(0)-> H-3(5), P-3(0)-> F-3(2) and P-3(0)-> F-3(3) transitions of Pr3+, respectively. In the light of the pump power dependence, the possible UC mechanism in Yb3+ and Pr3+ co-doped BaRE2ZnO5 (RE=Y, Gd) was proposed and discussed.
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